Citazione Stile APA (7a Edizione)

Mahmud, S. (1985). A Text Book of Higher Trigonometry (5th ed.). The Ideal Library.

Citazione stile Chigago Style (17a edizione)

Mahmud, Sultan. A Text Book of Higher Trigonometry. 5th ed. Dhaka: The Ideal Library, 1985.

Citatione MLA (9a ed.)

Mahmud, Sultan. A Text Book of Higher Trigonometry. 5th ed. The Ideal Library, 1985.